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What is the smallest number of whole logs (density = 715 kg/m³, radius = 0.086 m, length = 2.94 m) that can be used to build a raft that will carry 6 people, each of whom has a mass of 73.5 kg?
john throws a baseball from the outfield from shoulder height at an initial velocity of 29.4 ms at an initial angle of
Two identical diverging lenses are separated by 23 cm. The focal length of each lens is -14 cm. find the final image distance relative to the lens on the right
A microwave oven has a power requirement of 1256 W. A frozen dinner requires 5.2 min to heat on full power. How much electrical energy (in kWh) is utilized
q1. two balls of masses 43kg and 65kg are suspended. the lighter ball is pulled away to a 66 angle with the vertical
A thin lens has a focal length of 10.00 cm for red light. If the index of refraction for the lens material tends to decrease with increasing wavelength
in a youngs double-slit experiment the wavelength of the light used is 550 nm in vacuum and the separation between the
A ten pound car wheel has a moment of inertia of 0.3 kg m2. How much torque is required to stop the wheel
a frictionless pendulum of length 3 m swings with an amplitude of10 degrees. What is the kinetic energy of the pendulum whenits potential energy is 5 J
Approximation the force a person should exert on a string attached to a 0.130 kg ball to make the ball revolve in a horizontal circle of radius 0.600 m.
An energetic photon of wavelength 3.1 pm scatters off an electron at rest at an angle of 123 degrees. What is the wavelength of the scatter photon
A 50g marble moving at 2.2m/s strikes a 30g marble at rest. Assume the collision is perfectly elastic and the marbles collide head-on. A.What is the speed of the first marble immediately after the collision? B.What is the speed of the second marbl..
A pulse of light in air is incident on a medium with an indcident angle of 34 degrees. The velocity of light in the medium is 0.5 that of the speed of light. Find the refracted angle of the light in degrees.
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